Adjustable limit gauge



ym 2S, w23. 1MM@ B. H4 BLOOD. A DJusATAaLl-z LIMIT GAUGE,- FILED APR. 25. 1921.

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ADS*

STABLE Application iled April 25 T0 @ZZ fie/lim it may concern Ee it known t-liL Yctisen oit the United Stute, resnling` at liet" l in the county t i rtl,Y and the type adapted to be used to (Mernnne tie dimensions di cylindrical holes or other internal dimensions.

@ne obiect ot the invention is to provide a Ourige oit this type in which ineens is provided tor nioving one or the gri-ging pins longitudinally in the gauge freine between stop ineens operative on the pin and preterably adjustable.

.finether object oi the invention is to provide a siinplc and accurate cani ineens 'tor positively moving the movable gauge pin in both directions.

Another object of the invention is to provide ineens whereliy the inovable pin moving;` means :may be associated with the niovable pin in two delinite relatively spaced positions longitudinally of the pin whereby the gauge muy be set to nieasure widely vziiying dimensions.

Another olriect olf the invention is to 'provide the above defined mechanism in coinbinution with s, gauge having it second gings ing` pinv1 preferably in axial uligninent with the movable pin, and to provide ineans tor adjusting' the second pin whereby the gauge may be set vto measure widely varying diniensions.

llilith the above :ind otl er objects in viewnl my invention consists in the 'tentures ot construction and operation set forth in the 'tot lowing` illustrated in the ming. in such drawing; n1 'torining part ot this specificaturii, i e shown iny invention :is embodied in u. 'tor measuring internal j 4i .,'1 .i i il. dimensions out it nih be understood the.;` the invention can be otherwislae embodied and not to be construed that the durar deining or limiting the scope oi the tion, the claims appended to this spec` tion being relied upon to; that purpose.

CCNNECTIGUT, EEES-NOE TO PRATT @il NEW E'FJSEY.

, 1921.. Serial No. 464,129.

comprising the invention.

Fig'. is e rear eleve-tion thereof. H1if" 3 is a view similar to Fig'. l but showing portions thereot1 in section.

A is an end view ot the gauge.

Figs. 5 and 6 illustrate respectively end and side elevations of the inovable gsging pin.

7 end 8 illustrate respectively side and end elei'fations ot the means for moving he inovable pin.

Fig. 9 is en elevation of the adjustable gaging pin.

My invention is iLiiurticulerly 'applicable to liniit gauges either of the internal or eX- ternal type.` gauge einbodying the invention comprises a freine end two opposite contact pins `at opposite ends elI the traine, one pin preferably being' inova-ble longitudinally through a deiinite predetermined sinall distance and the other pin preiierubly being` longitudinally adjustable.

ln the druwingg l represents the gauge tri sind 2 and il represent the two gaging` lllien the gauge is intended .tor de- '.np; internal dimensions, the traine .s directly along straight lines from piu Ato the other. iis illustrated, the ed to provide s portion et one side thereoi ttor receiving the ing` pins and a portion at the other side thereof adapted to be gripped by the hand of the operator.

r1The pin 2 is preterably longitudinally iidl justable With respect to the traine 1 and a pair ot screws 4 and 5 abutting against pins Il and 5L and threzidedly engaging' the pin 2 ut 6 ure provided tor eliiecting this adjustnient. By this ineens the pin 2 can be adjusted to the desired posit: n longitudinally and by tightening; the screws Ll and 5, the pin is held secured. analist niovenient in either direction.

rvlie pin vil is adapted to nieve longitudinally between normally fixed stops. one of which is preierubly adjustable. is illustasted in the dimwing7 a pin l fitting in holes il in the `gauge traine comprises the inner step end a screw 9 coniprises the outer and edjusteble stop v'ihe screw vis adjustable toward and from a surface 10 formed by a .notch 11 cut in the pin and a lockinpT screw 12 is provided for securing the screw 9 in its adjusted position.

The means for moving the pin 3 between the stops preferably comprises a rotary eccentric or cam member operatively connected to the pin. .1 have illustrated the pin as formed with a notch 13 providing a pair of transverse shoulders 1-1- between which an eccentric portion 15 on la rotary adjusting element 16 is adapted to iit. A knurled knob V17 is secured to the element 16 by means of a pin 13 whereby the element may be turned. A spring 19 normally keeps the eccentric 15 seated in the notch 13. It will be seen that rotation of the knob 17 in one direction or the other is adapted to n'iove the pin to engage the stops.

The pin 3 is illustrated as provided with a second pair of notches 11a and 13a corresponding to but spaced from the notches 11 and 13. The gauge frame is also provided with a second pair of holes 82L for receiving the pin 7. By moving` the pin 3 outwardly to a position wherein the notch 11a comes opposite the screw 9 and engaging` the element 16 with the notch 13fL and placing the pin 7 in the holes 8, the measuring length of the gauge maybe considerably extended..

' In this position of the pin 3. the stop 9 .acts

against surface-10H. A. hole 20 provided in the gauge for initially receiving-the pin 1.6 in. the assemblingoperation. rlhe gauge may be provided with disks 21 for marking thek saine, if desired. v

In operation the gaging pins 2 and 3 are iirst set to approximately the dimension it is desired to measure. The gaging pin 3 is then placed in position against the stop pin 7 as illustrated in 'Fig 1. The gagging pin 2 is then adjusted accurately to the minimum dimension of the distance to be measured. The screw 9 is thereafter set to permit a movement of the pin 3 equal to the tolerance to be allowed between the minimum and maximum measuring dimensions. The operator may thereafter use the gauge for measuring the minimum and maximum. dimensions merely by rotating the knob 17.

What l claim isi 1.f gauge for determiring; dimensions comprising in combination.i a frame. a contact pin at one end of the frame, a contact pin at theother end of the frame and movable inward or outward with respect thereto, and means for moving the movable pin comprising an element rotatable about an axis perpendicular to the said pin and having a cam surface eccentric to its axis of rotation engaging the pin to positively move the same an adjustable limited distance in both directions.V

2. A. gauge for determining dimensions comprising in combination, a frame, a contact pin at one end of the frame, a contact pin at the other end of the frame and movable inward or outward with respect thereto, the movable pin having a recess in the side thereof., and means for moving the movable pin an adjustable limited distance comprising an element rotatable about an axis .perpendicular to the said pin and having` a cam surface eccentric to the axis of rotation engagging in the said recess.

3. A gauge" for determining dimensions comprising in combination7 a frame, a contactvpin at one end of the frame, a Contact pin mounted for free sliding movement in vthe other end of the frame, two stops for determining the limits of movement of the movable pin, and means for positively moving the said pin from each limit positionto the other. i

1. A gauge for determining dimensions comprising in combinationj a frame, a contact pin at one end of the frame, a contact pin at the other end of the frame and movable inward or outward with respect thereto, two stops operative on the movable pin for determining` the limits of movements thereof, and .means for positively moving the said pin from each limit position to the other. j' 5. A gauge for determiningdimensions compi'isinjg in combination, a frame, a contact pin at one end of the frame`,a contact `pin at the other end of the frame and movable inward or outward with. respect thereto, two stops for determining the limits of movement of the movable pin, and means for positively moving the said pin from either limit position to the other comprising an element rotatable `about an axis perpendicular tothe said pin and having a cam surface eccentric to its axis of rotation engaging the pin. l

6. A. gauge for determining` dimensions comprising in combination7 a frame,a contact pin at oneend of the frame, a contact pin at the other end. of the frame and movable inward or outward. with respect thereto,

two stops lfori1 determining); the limits of `i movement of the movable pin. one stop being adjustaliile to vary the longitudinal mov-l neutof the pm., and means for moving.;r

the said pin from one limit position to the other comprising an element rotatable about an axis perpendicular to the said pin and `having` a cam surface eccentric to its axis of rotation. engagingthe pin.

i'. A. gauge for deterniininp` dimensions comprising;- in con'ibinatioiu a frame, a. contact pin one end of the frame, a Contact pin at the other end of the fra me and movable inward 0r outward with respect thereto7 means for moving the movable pin comprising an element rotatable about an axis kperpendicular to the said pin., and means associated with the said movable pin for limiting Cir the longitudinal movement tl'iereot in both directions.

8.. gauge tor det-crn'iining dimensions comprising in combinatirm, a trame, a contact .pin at one end oft' the traine, a contact pin at the other end ot the Yla7-rane and movable inward or outward with respect thereto, two stops associated with the movable `gin 'for deterniining the limits ot niovement thereof7 -rew threads on one oit said stops engaging screw threads on said trame tor adjustingone stop longitud inaily o'i the sin7 andineans ior moving` the said pin from one limit pos'ion to the other co"iprising an element rotatable about an a is: perpemlicular to the said `pin and having a cam surface eccentric. to its axis ot rotation engaging the pin.

9. A gauge tor determining dimensions comprising in combination, a tranne7 a contact pin at one end of the trame, contact pin lat the other end ot the traine and movableinwardor outward with resgect thereto means for moving the movable pin comprising an element rotatable. about an axis perpend-icular tothe said pin7 and means tor as sociating the moving means with the movable pin in twodefinite relatively spaced positions longitudinally or the pin whereby the gauge may be set to measure widely varying dimensions. I

10. gauge tor determining dimensions comprising in combination, a trame, a contact pin at one end ot the traine, a. contact pin at the other end ot the trame and movable inward or outward with respect ther Ito., mea-ns for moving the .movable pin comprising an element rotatable about an anis perpendicular to the said pin and having a cam surface eccentric to its axis of rotation engaging the pin, and transverse shoulders formed in spaced relation longitudinally on the movable pin, either shoulder being adapted to be engaged b v the said cam sur- 'liace whereby the gauge may be set to measure widely varying dimensione.

11. A gauge 'tor determining dimensions comprising in combination. a trame7 a contact pin at one end ot' the 'trame7 a contact pin at the other end ot the 'trame and movable inward or outward with respect thereto, means for moving the movable pin comprising an element rotatable about an axis perpendicular to the said pin and having a cam surface eccentric to its oit rotation cngaging the pin, transverse shoulders termed in spaced relation longitudinally on the movable pin.r either shoulder being adapted to be engaged by the said cani surtace whereby the gauge may be set to measure widely varying dimensions. and means lor limiting the longitudinal movement oi? the pin by the said cam surface.

12. gauge for determiniiig dimensions comprising in cornloination trame, a conc l. Y 'l one con oi the c n, aA contact other end ol the trame and mov- `L b' ante inw aid or outward i respect thereto,

ioving the mova: y ie `@in conipristatablo about an axis pere saitL pin and haring a cam i to its @t rotation cnlie pin` svers (l rel tion if "-o'itudinally on the moveither sho lder being' adagted to be ward movable nin coinble aboutA an airis and having a oli rotation pim transverse shoulders Yformed in spaeed relation longitudinally on the mo ble pin, either shoulder being` adapterl be engaged by the said cam surnre whereby the gauge may be set to measure widely varying dimensions. and stop means associated h the pin in either of its positions tor limiting the longitudinal movement ot :ne `pin by die said cam surface, certain oit such being adjustable to vary the limitinglv 1Qosition ot' the pin.

lf-l. gauge 'for determining dimensions romprisi in combination, a trame, a contact pin one end ot the trame, means tor adjusting the said pin inward or outward and locking it in adjusted positiona a oontact bin at the other end ot' the 'frame and movable inward or outward with respect thereto? means ttor movingv the movable pin coi'nprising an clement engaging the movable pin and rotative relative thereto to positively more the same in both directions, and two stops tor limiting the movement ot the movable 1pin.

l5. il. range tor determining dimensions comprisin; in roinbiimtion, a trame. a. contact nin a t one end ol' the trame, means e shoulders formed coiuprising;v in combination, a iframe, a contact pin at one end oil.: the trame, means tor adjusting the said pin inward or outward and lockingY it in adjusted position, a contact pin at the other end oit the iframe and movable .inward or outward with respect thereto means for moving' the movable nin 7 e, vL

comprising an elen'ient rotatable about an axis perpendicular to the said `pin and having a cam'surface eccentric to its axis of' rotation engaging the pin to positively move the same in both directions, and means associated with the movable pin ior limiting the movement thereof in both directions.

17. A. gauge iiior determining internal dimensions comprisingr in combination, 'a frame, a contact pin projecting outward at one end oit the traine, a .contact pin projecting' outward at the other end ot the frame and movable inward or outward with respect thereto, the said iframe extendingI directly along` straight lines m one pin to the' other, means tor moving,` the movableq pin comprising an element rotatable about an aXls perpendicular to the said `pin and having` a cam surface eccentric to its axis i ,M o, fifi a ot rotation vengaging the pin to positively move the same in both directions, and means associated with the movable pin for limiting the movement thereof in both directions.

18. A gauge for determining internal dimensions comprising in combination, av

trame, a contact pin projecting outward 'at one end of the iframe, means ior adjusting the said pin inward or outward and lool;- ing it in adjusted position, a Contact pin projecting outward at the :trame and movable inward or outward with respect thereto, the said frame extending directly along straight lines from one pin to the other, means for moving the movable enriinr n. BLoon.

other end of the j 

